EP 0171835 A2 19860219 - A process of etching aluminium anode foil for high voltage electrolytic capacitors.
Title (en)
A process of etching aluminium anode foil for high voltage electrolytic capacitors.
Title (de)
Verfahren zum elektrolytischen Ätzen einer Aluminiumanodenfolie für Hochspannungskondensatoren.
Title (fr)
Procédé de décapage d'une feuille en aluminium pour anode de condensateurs électrolytiques à haute tension.
Publication
Application
Priority
US 63166784 A 19840716
Abstract (en)
Aluminium electrolytic capacitor anode foil of a high cubic texture etched in two step process by treating the foil in an electrolyte bath containing 3% hydrochloric acid and 1% aluminium as aluminium chloride under the influence of a direct current and at a temperature of 75 DEG C, and in a second step treating said etched foil in an aqueous bath of 8% nitric acid and 2.6% aluminium as a nitrate at a temperature of 85 DEG C for 5 to 7 minutes. The foil thus etched has a significantly higher capacitance resulting from a greater density of tunnels, an elongation of the tunnels, and a faily linear tunnel structure.
IPC 1-7
IPC 8 full level
C23F 1/20 (2006.01); C25D 11/16 (2006.01); C25F 3/04 (2006.01); H01G 9/04 (2006.01); H01G 9/055 (2006.01)
CPC (source: EP KR US)
C25F 3/04 (2013.01 - EP KR US); H01G 9/055 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI SE
DOCDB simple family (publication)
US 4525249 A 19850625; DE 3569127 D1 19890503; EP 0171835 A2 19860219; EP 0171835 A3 19861008; EP 0171835 B1 19890329; JP H0631480 B2 19940427; JP S6134187 A 19860218; KR 860001218 A 19860224; KR 920004509 B1 19920608
DOCDB simple family (application)
US 63166784 A 19840716; DE 3569127 T 19850708; EP 85201103 A 19850708; JP 15532985 A 19850716; KR 850005000 A 19850713